summaryrefslogtreecommitdiffstats
path: root/drivers/media/video/ivtv/ivtv-irq.c
diff options
context:
space:
mode:
authorIan Armstrong <ian@iarmst.demon.co.uk>2007-11-05 14:27:09 -0300
committerMauro Carvalho Chehab <mchehab@infradead.org>2008-01-25 19:03:11 -0200
commit77aded6ba51f01335840ce8e18b413067810b68e (patch)
tree2763dd287dd0f40bed5a1ba5262e0e13f58bf4e4 /drivers/media/video/ivtv/ivtv-irq.c
parent3b5c1c8e71eb8fe2297a5884db59108e3c8b44c5 (diff)
V4L/DVB (6717): ivtv: Initial merge of video48 yuv handling into the IVTV_IOC_DMA_FRAME framework
Previously, all yuv data written to /dev/video48 had only basic support with no double buffering to avoid display tearing. With this patch, yuv frames written to video48 are now handled by the existing IVTV_IOC_DMA_FRAME framework. As such, the frames are hardware buffered to avoid tearing, and honour scaling mode & field order options. Unlike the proprietary IVTV_IOC_DMA_FRAME ioctl, all parameters are controlled by the V4L2 API. Due to mpeg & yuv output restrictions being different, their V4L2 output controls have been separated. To control the yuv output, the V4L2 calls must be done via video48. If the ivtvfb module is loaded, there will be one side effect to this merge. The yuv output window will be constrained to the visible framebuffer area. In the event that a virtual framebuffer size is being used, the limit to the output size will be the virtual dimensions, but only the portion that falls within the currently visible area of the framebuffer will be shown. Like the IVTV_IOC_DMA_FRAME ioctl, the supplied frames must be padded to 720 pixels wide. However the height must only be padded up the nearest multiple of 32. This would mean an image of 102 lines must be padded to 128. As long as the true source image size is given, the padding will not be visible in the final output. Signed-off-by: Ian Armstrong <ian@iarmst.demon.co.uk> Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media/video/ivtv/ivtv-irq.c')
-rw-r--r--drivers/media/video/ivtv/ivtv-irq.c26
1 files changed, 23 insertions, 3 deletions
diff --git a/drivers/media/video/ivtv/ivtv-irq.c b/drivers/media/video/ivtv/ivtv-irq.c
index dd0dd8d126d..ebc200320e6 100644
--- a/drivers/media/video/ivtv/ivtv-irq.c
+++ b/drivers/media/video/ivtv/ivtv-irq.c
@@ -302,8 +302,11 @@ static void dma_post(struct ivtv_stream *s)
void ivtv_dma_stream_dec_prepare(struct ivtv_stream *s, u32 offset, int lock)
{
struct ivtv *itv = s->itv;
+ struct yuv_playback_info *yi = &itv->yuv_info;
+ u8 frame = yi->draw_frame;
+ struct yuv_frame_info *f = &yi->new_frame_info[frame];
struct ivtv_buffer *buf;
- u32 y_size = itv->params.height * itv->params.width;
+ u32 y_size = 720 * ((f->src_h + 31) & ~31);
u32 uv_offset = offset + IVTV_YUV_BUFFER_UV_OFFSET;
int y_done = 0;
int bytes_written = 0;
@@ -311,6 +314,18 @@ void ivtv_dma_stream_dec_prepare(struct ivtv_stream *s, u32 offset, int lock)
int idx = 0;
IVTV_DEBUG_HI_DMA("DEC PREPARE DMA %s: %08x %08x\n", s->name, s->q_predma.bytesused, offset);
+
+ /* Insert buffer block for YUV if needed */
+ if (s->type == IVTV_DEC_STREAM_TYPE_YUV && f->offset_y) {
+ if (yi->blanking_dmaptr) {
+ s->sg_pending[idx].src = yi->blanking_dmaptr;
+ s->sg_pending[idx].dst = offset;
+ s->sg_pending[idx].size = 720 * 16;
+ }
+ offset += 720 * 16;
+ idx++;
+ }
+
list_for_each_entry(buf, &s->q_predma.list, list) {
/* YUV UV Offset from Y Buffer */
if (s->type == IVTV_DEC_STREAM_TYPE_YUV && !y_done &&
@@ -713,8 +728,11 @@ static void ivtv_irq_dec_data_req(struct ivtv *itv)
ivtv_api_get_data(&itv->dec_mbox, IVTV_MBOX_DMA, data);
if (test_bit(IVTV_F_I_DEC_YUV, &itv->i_flags)) {
- itv->dma_data_req_size = itv->params.width * itv->params.height * 3 / 2;
- itv->dma_data_req_offset = data[1] ? data[1] : yuv_offset[0];
+ itv->dma_data_req_size =
+ 1080 * ((itv->yuv_info.v4l2_src_h + 31) & ~31);
+ itv->dma_data_req_offset = data[1];
+ if (atomic_read(&itv->yuv_info.next_dma_frame) >= 0)
+ ivtv_yuv_frame_complete(itv);
s = &itv->streams[IVTV_DEC_STREAM_TYPE_YUV];
}
else {
@@ -728,6 +746,8 @@ static void ivtv_irq_dec_data_req(struct ivtv *itv)
set_bit(IVTV_F_S_NEEDS_DATA, &s->s_flags);
}
else {
+ if (test_bit(IVTV_F_I_DEC_YUV, &itv->i_flags))
+ ivtv_yuv_setup_stream_frame(itv);
clear_bit(IVTV_F_S_NEEDS_DATA, &s->s_flags);
ivtv_queue_move(s, &s->q_full, NULL, &s->q_predma, itv->dma_data_req_size);
ivtv_dma_stream_dec_prepare(s, itv->dma_data_req_offset + IVTV_DECODER_OFFSET, 0);